The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 1989
Filed:
Dec. 09, 1986
Elmer A Hoyer, Wichita, KS (US);
NCR Corporation, Dayton, OH (US);
Abstract
An encoder, decoder and method is provided with each being usable independently of each other for improving the dynamic range of digitized speech signals systems by providing amplitude and frequency components to the digitized signals. The encoder processes a speech signal by first converting the speech signal to a single sideband signal and then passing that signal along two signal paths. The first signal path includes an envelope detector and a digitizing means for forming a first digitized signal having amplitude information. The second signal path includes a clipper, frequency-to-voltage converter and digitizer means for forming a second digitized signal havig frequency information. Both digitized signals may then be transmitted to the decoder for reconstruction or stored for reconstruction at a later time. The signals may be transmitted in parallel or serially using multiplexing techniques.